Chemistry

Problem

A Zn rod weighing 25 g was kept in 100 mL of 1 M

\text{CuSO}_4

solution. After a certain time the molarity of

\text{Cu}^{2+}

in solution was 0.8. What was molarity of

\text{SO}_4^{2-}

? What was the mass of Zn rod after cleaning? (Atomic mass of Zn = 65.4)